Number
1,987
1,987 is a prime, odd, a calendar year.
Notable events — 1987 AD
- Feb 23 Supernova SN 1987A is observed — the first naked-eye supernova in nearly 400 years.
- Mar 20 The FDA approves AZT as the first drug to treat HIV/AIDS.
- Apr 19 The Simpsons debuts as shorts on The Tracey Ullman Show.
- Jun 12 Reagan delivers his "tear down this wall" speech at the Brandenburg Gate.
- Oct 19 Black Monday: stock markets crash worldwide; the Dow falls 22.6 % in one day.
- Dec 8 Reagan and Gorbachev sign the INF Treaty, eliminating intermediate-range nuclear missiles.
Events compiled from Wikipedia ↗ · Licensed CC BY-SA 4.0
Year facts
- Year type
-
Common year
Standard 365-day year; not divisible by 4 (or divisible by 100 but not 400).
- Days in year
- 365
- ISO weeks
-
53
Long year: contains 53 ISO weeks.
- Started on
-
Thursday
January 1, 1987
- Ended on
-
Thursday
December 31, 1987
- Friday the 13ths
-
3
3 Friday the 13ths this year.
- Easter Sunday
-
April 19
Sunday, April 19, 1987
- Decade
-
1980s
1980–1989
- Century
-
20th century
1901–2000
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
39
39 years before 2026.
In other calendars
- Hebrew
-
5747 / 5748 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1407 / 1408 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Fire zodiac:Rabbit
Sexagenary cycle position 4 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2530 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1365 / 1366 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1979 / 1980 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1909 / 1908 Saka
Indian national calendar; year starts in March.
- Japanese
-
Shōwa 62
Reign-era counting from the start of each emperor's reign.
Properties
Primality
1,987 is prime. It has exactly two divisors: 1 and itself.
Divisors & multiples
Aliquot sum (sum of proper divisors):
1
First multiples
Sums & aliquot sequence
As consecutive integers:
993 + 994
Representations
- In words
- one thousand nine hundred eighty-seven
- Ordinal
- 1987th
- Roman numeral
- MCMLXXXVII
- Binary
- 11111000011
- Octal
- 3703
- Hexadecimal
- 0x7C3
- Base64
- B8M=
- One's complement
- 63,548 (16-bit)
In other bases
ternary (3)
2201121
quaternary (4)
133003
quinary (5)
30422
senary (6)
13111
septenary (7)
5536
nonary (9)
2647
undecimal (11)
1547
duodecimal (12)
1197
tridecimal (13)
b9b
tetradecimal (14)
a1d
pentadecimal (15)
8c7
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αϡπζʹ
- Mayan (base 20)
- 𝋤·𝋳·𝋧
- Chinese
- 一千九百八十七
- Chinese (financial)
- 壹仟玖佰捌拾柒
In other modern scripts
Eastern Arabic
١٩٨٧
Devanagari
१९८७
Bengali
১৯৮৭
Tamil
௧௯௮௭
Thai
๑๙๘๗
Tibetan
༡༩༨༧
Khmer
១៩៨៧
Lao
໑໙໘໗
Burmese
၁၉၈၇
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,987 = 3
- e — Euler's number (e)
- Digit 1,987 = 8
- φ — Golden ratio (φ)
- Digit 1,987 = 9
- √2 — Pythagoras's (√2)
- Digit 1,987 = 5
- ln 2 — Natural log of 2
- Digit 1,987 = 2
- γ — Euler-Mascheroni (γ)
- Digit 1,987 = 5
Also seen as
Prime neighborhood
Unicode codepoint
߃
Nko Digit Three
U+07C3
Decimal digit (Nd)
UTF-8 encoding: DF 83 (2 bytes).
Hex color
#0007C3
RGB(0, 7, 195)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.7.195.
- Address
- 0.0.7.195
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.7.195
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Position in π
The digit sequence 1987 first appears in π at position 8,690 of the decimal expansion (the 8,690ordinal-suffix:th digit after the integer 3).
Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.